Algebra 1 (Reiny or Kuai)
posted by Anonymous on .
1. Graph each equation. Tell whether the equation represents a function.
a. y = (x  2)^2  1
b. x + y = 6
c. y = x 3
d. y = x^2 + 1
How am I supposed to graph these?
2. For each function, determine whether the given points are on the graph.
a. y = 7x  2; (1, 5) and (2, 10)

Can anyone help me?

make a table of values for each, plot the points and join them with smooth curves for the 1st and last.
The 1st and last are parabolas, the first has a vertex at (2,1), the last one has a vertex at (0,1)
Both open up
the other two are linear , that is, straight lines, but
the y = x 3 lies all above the xaxis
I suggest graphing y = x , then reflecting the part which falls below the xaxis in the xaxis then moving the curve down by 3 units
see:
http://www.wolframalpha.com/input/?i=plot+y+%3D+%7Cx%7C++3
One of my favourite webpages, simply change the equation for the others. 
The line
" the y = x  3 lies all above the xaxis" is not correct,
should have said
"the y = x  3 lies all above 3 "